21310960

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{397}}^1$

素因数の和:482

約数の個数: 80

約数和(自身を含む): 55076832

約数和(自身を除く): 33765872

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 61, 80, 88, 110, 122, 176, 220, 244, 305, 397, 440, 488, 610, 671, 794, 880, 976, 1220, 1342, 1588, 1985, 2440, 2684, 3176, 3355, 3970, 4367, 4880, 5368, 6352, 6710, 7940, 8734, 10736, 13420, 15880, 17468, 21835, 24217, 26840, 31760, 34936, 43670, 48434, 53680, 69872, 87340, 96868, 121085, 174680, 193736, 242170, 266387, 349360, 387472, 484340, 532774, 968680, 1065548, 1331935, 1937360, 2131096, 2663870, 4262192, 5327740, 10655480, 21310960]

約数ペア:

[(1, 21310960), (2, 10655480), (4, 5327740), (5, 4262192), (8, 2663870), (10, 2131096), (11, 1937360), (16, 1331935), (20, 1065548), (22, 968680), (40, 532774), (44, 484340), (55, 387472), (61, 349360), (80, 266387), (88, 242170), (110, 193736), (122, 174680), (176, 121085), (220, 96868), (244, 87340), (305, 69872), (397, 53680), (440, 48434), (488, 43670), (610, 34936), (671, 31760), (794, 26840), (880, 24217), (976, 21835), (1220, 17468), (1342, 15880), (1588, 13420), (1985, 10736), (2440, 8734), (2684, 7940), (3176, 6710), (3355, 6352), (3970, 5368), (4367, 4880)]