21941560

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{787}}^1$

素因数の和:856

約数の個数: 64

約数和(自身を含む): 53615520

約数和(自身を除く): 31673960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 41, 68, 82, 85, 136, 164, 170, 205, 328, 340, 410, 680, 697, 787, 820, 1394, 1574, 1640, 2788, 3148, 3485, 3935, 5576, 6296, 6970, 7870, 13379, 13940, 15740, 26758, 27880, 31480, 32267, 53516, 64534, 66895, 107032, 129068, 133790, 161335, 258136, 267580, 322670, 535160, 548539, 645340, 1097078, 1290680, 2194156, 2742695, 4388312, 5485390, 10970780, 21941560]

約数ペア:

[(1, 21941560), (2, 10970780), (4, 5485390), (5, 4388312), (8, 2742695), (10, 2194156), (17, 1290680), (20, 1097078), (34, 645340), (40, 548539), (41, 535160), (68, 322670), (82, 267580), (85, 258136), (136, 161335), (164, 133790), (170, 129068), (205, 107032), (328, 66895), (340, 64534), (410, 53516), (680, 32267), (697, 31480), (787, 27880), (820, 26758), (1394, 15740), (1574, 13940), (1640, 13379), (2788, 7870), (3148, 6970), (3485, 6296), (3935, 5576)]