81007960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{5939}}^1$

素因数の和:5992

約数の個数: 64

約数和(自身を含む): 205286400

約数和(自身を除く): 124278440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1705, 2728, 3410, 5939, 6820, 11878, 13640, 23756, 29695, 47512, 59390, 65329, 118780, 130658, 184109, 237560, 261316, 326645, 368218, 522632, 653290, 736436, 920545, 1306580, 1472872, 1841090, 2025199, 2613160, 3682180, 4050398, 7364360, 8100796, 10125995, 16201592, 20251990, 40503980, 81007960]

約数ペア:

[(1, 81007960), (2, 40503980), (4, 20251990), (5, 16201592), (8, 10125995), (10, 8100796), (11, 7364360), (20, 4050398), (22, 3682180), (31, 2613160), (40, 2025199), (44, 1841090), (55, 1472872), (62, 1306580), (88, 920545), (110, 736436), (124, 653290), (155, 522632), (220, 368218), (248, 326645), (310, 261316), (341, 237560), (440, 184109), (620, 130658), (682, 118780), (1240, 65329), (1364, 59390), (1705, 47512), (2728, 29695), (3410, 23756), (5939, 13640), (6820, 11878)]