21537880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:189

約数の個数: 128

約数和(自身を含む): 61246080

約数和(自身を除く): 39708200

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 61, 65, 70, 91, 97, 104, 122, 130, 140, 182, 194, 244, 260, 280, 305, 364, 388, 427, 455, 485, 488, 520, 610, 679, 728, 776, 793, 854, 910, 970, 1220, 1261, 1358, 1586, 1708, 1820, 1940, 2135, 2440, 2522, 2716, 3172, 3395, 3416, 3640, 3880, 3965, 4270, 5044, 5432, 5551, 5917, 6305, 6344, 6790, 7930, 8540, 8827, 10088, 11102, 11834, 12610, 13580, 15860, 17080, 17654, 22204, 23668, 25220, 27160, 27755, 29585, 31720, 35308, 41419, 44135, 44408, 47336, 50440, 55510, 59170, 70616, 76921, 82838, 88270, 111020, 118340, 153842, 165676, 176540, 207095, 222040, 236680, 307684, 331352, 353080, 384605, 414190, 538447, 615368, 769210, 828380, 1076894, 1538420, 1656760, 2153788, 2692235, 3076840, 4307576, 5384470, 10768940, 21537880]

約数ペア:

[(1, 21537880), (2, 10768940), (4, 5384470), (5, 4307576), (7, 3076840), (8, 2692235), (10, 2153788), (13, 1656760), (14, 1538420), (20, 1076894), (26, 828380), (28, 769210), (35, 615368), (40, 538447), (52, 414190), (56, 384605), (61, 353080), (65, 331352), (70, 307684), (91, 236680), (97, 222040), (104, 207095), (122, 176540), (130, 165676), (140, 153842), (182, 118340), (194, 111020), (244, 88270), (260, 82838), (280, 76921), (305, 70616), (364, 59170), (388, 55510), (427, 50440), (455, 47336), (485, 44408), (488, 44135), (520, 41419), (610, 35308), (679, 31720), (728, 29585), (776, 27755), (793, 27160), (854, 25220), (910, 23668), (970, 22204), (1220, 17654), (1261, 17080), (1358, 15860), (1586, 13580), (1708, 12610), (1820, 11834), (1940, 11102), (2135, 10088), (2440, 8827), (2522, 8540), (2716, 7930), (3172, 6790), (3395, 6344), (3416, 6305), (3640, 5917), (3880, 5551), (3965, 5432), (4270, 5044)]