20506980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{431}}^1$

素因数の和:517

約数の個数: 96

約数和(自身を含む): 62995968

約数和(自身を除く): 42488988

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 61, 65, 78, 122, 130, 156, 183, 195, 244, 260, 305, 366, 390, 431, 610, 732, 780, 793, 862, 915, 1220, 1293, 1586, 1724, 1830, 2155, 2379, 2586, 3172, 3660, 3965, 4310, 4758, 5172, 5603, 6465, 7930, 8620, 9516, 11206, 11895, 12930, 15860, 16809, 22412, 23790, 25860, 26291, 28015, 33618, 47580, 52582, 56030, 67236, 78873, 84045, 105164, 112060, 131455, 157746, 168090, 262910, 315492, 336180, 341783, 394365, 525820, 683566, 788730, 1025349, 1367132, 1577460, 1708915, 2050698, 3417830, 4101396, 5126745, 6835660, 10253490, 20506980]

約数ペア:

[(1, 20506980), (2, 10253490), (3, 6835660), (4, 5126745), (5, 4101396), (6, 3417830), (10, 2050698), (12, 1708915), (13, 1577460), (15, 1367132), (20, 1025349), (26, 788730), (30, 683566), (39, 525820), (52, 394365), (60, 341783), (61, 336180), (65, 315492), (78, 262910), (122, 168090), (130, 157746), (156, 131455), (183, 112060), (195, 105164), (244, 84045), (260, 78873), (305, 67236), (366, 56030), (390, 52582), (431, 47580), (610, 33618), (732, 28015), (780, 26291), (793, 25860), (862, 23790), (915, 22412), (1220, 16809), (1293, 15860), (1586, 12930), (1724, 11895), (1830, 11206), (2155, 9516), (2379, 8620), (2586, 7930), (3172, 6465), (3660, 5603), (3965, 5172), (4310, 4758)]