20171970

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{821}}^1$

素因数の和:857

約数の個数: 128

約数和(自身を含む): 66286080

約数和(自身を除く): 46114110

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 27, 30, 35, 39, 42, 45, 54, 63, 65, 70, 78, 90, 91, 105, 117, 126, 130, 135, 182, 189, 195, 210, 234, 270, 273, 315, 351, 378, 390, 455, 546, 585, 630, 702, 819, 821, 910, 945, 1170, 1365, 1638, 1642, 1755, 1890, 2457, 2463, 2730, 3510, 4095, 4105, 4914, 4926, 5747, 7389, 8190, 8210, 10673, 11494, 12285, 12315, 14778, 17241, 21346, 22167, 24570, 24630, 28735, 32019, 34482, 36945, 44334, 51723, 53365, 57470, 64038, 73890, 74711, 86205, 96057, 103446, 106730, 110835, 149422, 155169, 160095, 172410, 192114, 221670, 224133, 258615, 288171, 310338, 320190, 373555, 448266, 480285, 517230, 576342, 672399, 747110, 775845, 960570, 1120665, 1344798, 1440855, 1551690, 2017197, 2241330, 2881710, 3361995, 4034394, 6723990, 10085985, 20171970]

約数ペア:

[(1, 20171970), (2, 10085985), (3, 6723990), (5, 4034394), (6, 3361995), (7, 2881710), (9, 2241330), (10, 2017197), (13, 1551690), (14, 1440855), (15, 1344798), (18, 1120665), (21, 960570), (26, 775845), (27, 747110), (30, 672399), (35, 576342), (39, 517230), (42, 480285), (45, 448266), (54, 373555), (63, 320190), (65, 310338), (70, 288171), (78, 258615), (90, 224133), (91, 221670), (105, 192114), (117, 172410), (126, 160095), (130, 155169), (135, 149422), (182, 110835), (189, 106730), (195, 103446), (210, 96057), (234, 86205), (270, 74711), (273, 73890), (315, 64038), (351, 57470), (378, 53365), (390, 51723), (455, 44334), (546, 36945), (585, 34482), (630, 32019), (702, 28735), (819, 24630), (821, 24570), (910, 22167), (945, 21346), (1170, 17241), (1365, 14778), (1638, 12315), (1642, 12285), (1755, 11494), (1890, 10673), (2457, 8210), (2463, 8190), (2730, 7389), (3510, 5747), (4095, 4926), (4105, 4914)]