20523720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{461}}^1$

素因数の和:535

約数の個数: 128

約数和(自身を含む): 71850240

約数和(自身を除く): 51326520

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 53, 56, 60, 70, 84, 105, 106, 120, 140, 159, 168, 210, 212, 265, 280, 318, 371, 420, 424, 461, 530, 636, 742, 795, 840, 922, 1060, 1113, 1272, 1383, 1484, 1590, 1844, 1855, 2120, 2226, 2305, 2766, 2968, 3180, 3227, 3688, 3710, 4452, 4610, 5532, 5565, 6360, 6454, 6915, 7420, 8904, 9220, 9681, 11064, 11130, 12908, 13830, 14840, 16135, 18440, 19362, 22260, 24433, 25816, 27660, 32270, 38724, 44520, 48405, 48866, 55320, 64540, 73299, 77448, 96810, 97732, 122165, 129080, 146598, 171031, 193620, 195464, 244330, 293196, 342062, 366495, 387240, 488660, 513093, 586392, 684124, 732990, 855155, 977320, 1026186, 1368248, 1465980, 1710310, 2052372, 2565465, 2931960, 3420620, 4104744, 5130930, 6841240, 10261860, 20523720]

約数ペア:

[(1, 20523720), (2, 10261860), (3, 6841240), (4, 5130930), (5, 4104744), (6, 3420620), (7, 2931960), (8, 2565465), (10, 2052372), (12, 1710310), (14, 1465980), (15, 1368248), (20, 1026186), (21, 977320), (24, 855155), (28, 732990), (30, 684124), (35, 586392), (40, 513093), (42, 488660), (53, 387240), (56, 366495), (60, 342062), (70, 293196), (84, 244330), (105, 195464), (106, 193620), (120, 171031), (140, 146598), (159, 129080), (168, 122165), (210, 97732), (212, 96810), (265, 77448), (280, 73299), (318, 64540), (371, 55320), (420, 48866), (424, 48405), (461, 44520), (530, 38724), (636, 32270), (742, 27660), (795, 25816), (840, 24433), (922, 22260), (1060, 19362), (1113, 18440), (1272, 16135), (1383, 14840), (1484, 13830), (1590, 12908), (1844, 11130), (1855, 11064), (2120, 9681), (2226, 9220), (2305, 8904), (2766, 7420), (2968, 6915), (3180, 6454), (3227, 6360), (3688, 5565), (3710, 5532), (4452, 4610)]