21681270

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:132

約数の個数: 160

約数和(自身を含む): 65862720

約数和(自身を除く): 44181450

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 18, 26, 27, 29, 30, 39, 45, 54, 58, 65, 71, 78, 81, 87, 90, 117, 130, 135, 142, 145, 162, 174, 195, 213, 234, 261, 270, 290, 351, 355, 377, 390, 405, 426, 435, 522, 585, 639, 702, 710, 754, 783, 810, 870, 923, 1053, 1065, 1131, 1170, 1278, 1305, 1566, 1755, 1846, 1885, 1917, 2059, 2106, 2130, 2262, 2349, 2610, 2769, 3195, 3393, 3510, 3770, 3834, 3915, 4118, 4615, 4698, 5265, 5538, 5655, 5751, 6177, 6390, 6786, 7830, 8307, 9230, 9585, 10179, 10295, 10530, 11310, 11502, 11745, 12354, 13845, 16614, 16965, 18531, 19170, 20358, 20590, 23490, 24921, 26767, 27690, 28755, 30537, 30885, 33930, 37062, 41535, 49842, 50895, 53534, 55593, 57510, 61074, 61770, 74763, 80301, 83070, 92655, 101790, 111186, 124605, 133835, 149526, 152685, 160602, 166779, 185310, 240903, 249210, 267670, 277965, 305370, 333558, 373815, 401505, 481806, 555930, 722709, 747630, 803010, 833895, 1204515, 1445418, 1667790, 2168127, 2409030, 3613545, 4336254, 7227090, 10840635, 21681270]

約数ペア:

[(1, 21681270), (2, 10840635), (3, 7227090), (5, 4336254), (6, 3613545), (9, 2409030), (10, 2168127), (13, 1667790), (15, 1445418), (18, 1204515), (26, 833895), (27, 803010), (29, 747630), (30, 722709), (39, 555930), (45, 481806), (54, 401505), (58, 373815), (65, 333558), (71, 305370), (78, 277965), (81, 267670), (87, 249210), (90, 240903), (117, 185310), (130, 166779), (135, 160602), (142, 152685), (145, 149526), (162, 133835), (174, 124605), (195, 111186), (213, 101790), (234, 92655), (261, 83070), (270, 80301), (290, 74763), (351, 61770), (355, 61074), (377, 57510), (390, 55593), (405, 53534), (426, 50895), (435, 49842), (522, 41535), (585, 37062), (639, 33930), (702, 30885), (710, 30537), (754, 28755), (783, 27690), (810, 26767), (870, 24921), (923, 23490), (1053, 20590), (1065, 20358), (1131, 19170), (1170, 18531), (1278, 16965), (1305, 16614), (1566, 13845), (1755, 12354), (1846, 11745), (1885, 11502), (1917, 11310), (2059, 10530), (2106, 10295), (2130, 10179), (2262, 9585), (2349, 9230), (2610, 8307), (2769, 7830), (3195, 6786), (3393, 6390), (3510, 6177), (3770, 5751), (3834, 5655), (3915, 5538), (4118, 5265), (4615, 4698)]