20155580

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:147

約数の個数: 96

約数和(自身を含む): 48384000

約数和(自身を除く): 28228420

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 31, 38, 58, 59, 62, 76, 95, 116, 118, 124, 145, 155, 190, 236, 290, 295, 310, 380, 551, 580, 589, 590, 620, 899, 1102, 1121, 1178, 1180, 1711, 1798, 1829, 2204, 2242, 2356, 2755, 2945, 3422, 3596, 3658, 4484, 4495, 5510, 5605, 5890, 6844, 7316, 8555, 8990, 9145, 11020, 11210, 11780, 17081, 17110, 17980, 18290, 22420, 32509, 34162, 34220, 34751, 36580, 53041, 65018, 68324, 69502, 85405, 106082, 130036, 139004, 162545, 170810, 173755, 212164, 265205, 325090, 341620, 347510, 530410, 650180, 695020, 1007779, 1060820, 2015558, 4031116, 5038895, 10077790, 20155580]

約数ペア:

[(1, 20155580), (2, 10077790), (4, 5038895), (5, 4031116), (10, 2015558), (19, 1060820), (20, 1007779), (29, 695020), (31, 650180), (38, 530410), (58, 347510), (59, 341620), (62, 325090), (76, 265205), (95, 212164), (116, 173755), (118, 170810), (124, 162545), (145, 139004), (155, 130036), (190, 106082), (236, 85405), (290, 69502), (295, 68324), (310, 65018), (380, 53041), (551, 36580), (580, 34751), (589, 34220), (590, 34162), (620, 32509), (899, 22420), (1102, 18290), (1121, 17980), (1178, 17110), (1180, 17081), (1711, 11780), (1798, 11210), (1829, 11020), (2204, 9145), (2242, 8990), (2356, 8555), (2755, 7316), (2945, 6844), (3422, 5890), (3596, 5605), (3658, 5510), (4484, 4495)]