21781030

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{67}}^1$

素因数の和:181

約数の個数: 64

約数和(自身を含む): 44064000

約数和(自身を除く): 22282970

約数列:

[1, 2, 5, 10, 19, 29, 38, 58, 59, 67, 95, 118, 134, 145, 190, 290, 295, 335, 551, 590, 670, 1102, 1121, 1273, 1711, 1943, 2242, 2546, 2755, 3422, 3886, 3953, 5510, 5605, 6365, 7906, 8555, 9715, 11210, 12730, 17110, 19430, 19765, 32509, 36917, 39530, 65018, 73834, 75107, 114637, 150214, 162545, 184585, 229274, 325090, 369170, 375535, 573185, 751070, 1146370, 2178103, 4356206, 10890515, 21781030]

約数ペア:

[(1, 21781030), (2, 10890515), (5, 4356206), (10, 2178103), (19, 1146370), (29, 751070), (38, 573185), (58, 375535), (59, 369170), (67, 325090), (95, 229274), (118, 184585), (134, 162545), (145, 150214), (190, 114637), (290, 75107), (295, 73834), (335, 65018), (551, 39530), (590, 36917), (670, 32509), (1102, 19765), (1121, 19430), (1273, 17110), (1711, 12730), (1943, 11210), (2242, 9715), (2546, 8555), (2755, 7906), (3422, 6365), (3886, 5605), (3953, 5510)]