21468280

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{241}}^1$

素因数の和:400

約数の個数: 64

約数和(自身を含む): 51749280

約数和(自身を除く): 30281000

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 131, 136, 170, 241, 262, 340, 482, 524, 655, 680, 964, 1048, 1205, 1310, 1928, 2227, 2410, 2620, 4097, 4454, 4820, 5240, 8194, 8908, 9640, 11135, 16388, 17816, 20485, 22270, 31571, 32776, 40970, 44540, 63142, 81940, 89080, 126284, 157855, 163880, 252568, 315710, 536707, 631420, 1073414, 1262840, 2146828, 2683535, 4293656, 5367070, 10734140, 21468280]

約数ペア:

[(1, 21468280), (2, 10734140), (4, 5367070), (5, 4293656), (8, 2683535), (10, 2146828), (17, 1262840), (20, 1073414), (34, 631420), (40, 536707), (68, 315710), (85, 252568), (131, 163880), (136, 157855), (170, 126284), (241, 89080), (262, 81940), (340, 63142), (482, 44540), (524, 40970), (655, 32776), (680, 31571), (964, 22270), (1048, 20485), (1205, 17816), (1310, 16388), (1928, 11135), (2227, 9640), (2410, 8908), (2620, 8194), (4097, 5240), (4454, 4820)]