20981220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{727}}^1$

素因数の和:789

約数の個数: 96

約数和(自身を含む): 65065728

約数和(自身を除く): 44084508

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 37, 39, 52, 60, 65, 74, 78, 111, 130, 148, 156, 185, 195, 222, 260, 370, 390, 444, 481, 555, 727, 740, 780, 962, 1110, 1443, 1454, 1924, 2181, 2220, 2405, 2886, 2908, 3635, 4362, 4810, 5772, 7215, 7270, 8724, 9451, 9620, 10905, 14430, 14540, 18902, 21810, 26899, 28353, 28860, 37804, 43620, 47255, 53798, 56706, 80697, 94510, 107596, 113412, 134495, 141765, 161394, 189020, 268990, 283530, 322788, 349687, 403485, 537980, 567060, 699374, 806970, 1049061, 1398748, 1613940, 1748435, 2098122, 3496870, 4196244, 5245305, 6993740, 10490610, 20981220]

約数ペア:

[(1, 20981220), (2, 10490610), (3, 6993740), (4, 5245305), (5, 4196244), (6, 3496870), (10, 2098122), (12, 1748435), (13, 1613940), (15, 1398748), (20, 1049061), (26, 806970), (30, 699374), (37, 567060), (39, 537980), (52, 403485), (60, 349687), (65, 322788), (74, 283530), (78, 268990), (111, 189020), (130, 161394), (148, 141765), (156, 134495), (185, 113412), (195, 107596), (222, 94510), (260, 80697), (370, 56706), (390, 53798), (444, 47255), (481, 43620), (555, 37804), (727, 28860), (740, 28353), (780, 26899), (962, 21810), (1110, 18902), (1443, 14540), (1454, 14430), (1924, 10905), (2181, 9620), (2220, 9451), (2405, 8724), (2886, 7270), (2908, 7215), (3635, 5772), (4362, 4810)]