19657720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:316

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 26790920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 83, 124, 155, 166, 191, 248, 310, 332, 382, 415, 620, 664, 764, 830, 955, 1240, 1528, 1660, 1910, 2573, 3320, 3820, 5146, 5921, 7640, 10292, 11842, 12865, 15853, 20584, 23684, 25730, 29605, 31706, 47368, 51460, 59210, 63412, 79265, 102920, 118420, 126824, 158530, 236840, 317060, 491443, 634120, 982886, 1965772, 2457215, 3931544, 4914430, 9828860, 19657720]

約数ペア:

[(1, 19657720), (2, 9828860), (4, 4914430), (5, 3931544), (8, 2457215), (10, 1965772), (20, 982886), (31, 634120), (40, 491443), (62, 317060), (83, 236840), (124, 158530), (155, 126824), (166, 118420), (191, 102920), (248, 79265), (310, 63412), (332, 59210), (382, 51460), (415, 47368), (620, 31706), (664, 29605), (764, 25730), (830, 23684), (955, 20584), (1240, 15853), (1528, 12865), (1660, 11842), (1910, 10292), (2573, 7640), (3320, 5921), (3820, 5146)]