21153780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{223}}^1$

素因数の和:286

約数の個数: 144

約数和(自身を含む): 70447104

約数和(自身を除く): 49293324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 31, 34, 36, 45, 51, 60, 62, 68, 85, 90, 93, 102, 124, 153, 155, 170, 180, 186, 204, 223, 255, 279, 306, 310, 340, 372, 446, 465, 510, 527, 558, 612, 620, 669, 765, 892, 930, 1020, 1054, 1115, 1116, 1338, 1395, 1530, 1581, 1860, 2007, 2108, 2230, 2635, 2676, 2790, 3060, 3162, 3345, 3791, 4014, 4460, 4743, 5270, 5580, 6324, 6690, 6913, 7582, 7905, 8028, 9486, 10035, 10540, 11373, 13380, 13826, 15164, 15810, 18955, 18972, 20070, 20739, 22746, 23715, 27652, 31620, 34119, 34565, 37910, 40140, 41478, 45492, 47430, 56865, 62217, 68238, 69130, 75820, 82956, 94860, 103695, 113730, 117521, 124434, 136476, 138260, 170595, 207390, 227460, 235042, 248868, 311085, 341190, 352563, 414780, 470084, 587605, 622170, 682380, 705126, 1057689, 1175210, 1244340, 1410252, 1762815, 2115378, 2350420, 3525630, 4230756, 5288445, 7051260, 10576890, 21153780]

約数ペア:

[(1, 21153780), (2, 10576890), (3, 7051260), (4, 5288445), (5, 4230756), (6, 3525630), (9, 2350420), (10, 2115378), (12, 1762815), (15, 1410252), (17, 1244340), (18, 1175210), (20, 1057689), (30, 705126), (31, 682380), (34, 622170), (36, 587605), (45, 470084), (51, 414780), (60, 352563), (62, 341190), (68, 311085), (85, 248868), (90, 235042), (93, 227460), (102, 207390), (124, 170595), (153, 138260), (155, 136476), (170, 124434), (180, 117521), (186, 113730), (204, 103695), (223, 94860), (255, 82956), (279, 75820), (306, 69130), (310, 68238), (340, 62217), (372, 56865), (446, 47430), (465, 45492), (510, 41478), (527, 40140), (558, 37910), (612, 34565), (620, 34119), (669, 31620), (765, 27652), (892, 23715), (930, 22746), (1020, 20739), (1054, 20070), (1115, 18972), (1116, 18955), (1338, 15810), (1395, 15164), (1530, 13826), (1581, 13380), (1860, 11373), (2007, 10540), (2108, 10035), (2230, 9486), (2635, 8028), (2676, 7905), (2790, 7582), (3060, 6913), (3162, 6690), (3345, 6324), (3791, 5580), (4014, 5270), (4460, 4743)]