21431884720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{109391}}^1$

素因数の和:109514

約数の個数: 80

約数和(自身を含む): 52088094720

約数和(自身を除く): 30656210000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 79, 80, 124, 155, 158, 248, 310, 316, 395, 496, 620, 632, 790, 1240, 1264, 1580, 2449, 2480, 3160, 4898, 6320, 9796, 12245, 19592, 24490, 39184, 48980, 97960, 109391, 195920, 218782, 437564, 546955, 875128, 1093910, 1750256, 2187820, 3391121, 4375640, 6782242, 8641889, 8751280, 13564484, 16955605, 17283778, 27128968, 33911210, 34567556, 43209445, 54257936, 67822420, 69135112, 86418890, 135644840, 138270224, 172837780, 267898559, 271289680, 345675560, 535797118, 691351120, 1071594236, 1339492795, 2143188472, 2678985590, 4286376944, 5357971180, 10715942360, 21431884720]

約数ペア:

[(1, 21431884720), (2, 10715942360), (4, 5357971180), (5, 4286376944), (8, 2678985590), (10, 2143188472), (16, 1339492795), (20, 1071594236), (31, 691351120), (40, 535797118), (62, 345675560), (79, 271289680), (80, 267898559), (124, 172837780), (155, 138270224), (158, 135644840), (248, 86418890), (310, 69135112), (316, 67822420), (395, 54257936), (496, 43209445), (620, 34567556), (632, 33911210), (790, 27128968), (1240, 17283778), (1264, 16955605), (1580, 13564484), (2449, 8751280), (2480, 8641889), (3160, 6782242), (4898, 4375640), (6320, 3391121), (9796, 2187820), (12245, 1750256), (19592, 1093910), (24490, 875128), (39184, 546955), (48980, 437564), (97960, 218782), (109391, 195920)]