20211290875

素因数分解:

$5^3\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{641}}^1$

素因数の和:869

約数の個数: 64

約数和(自身を含む): 26664468480

約数和(自身を除く): 6453177605

約数列:

[1, 5, 25, 31, 79, 103, 125, 155, 395, 515, 641, 775, 1975, 2449, 2575, 3193, 3205, 3875, 8137, 9875, 12245, 12875, 15965, 16025, 19871, 40685, 50639, 61225, 66023, 79825, 80125, 99355, 203425, 252247, 253195, 306125, 330115, 399125, 496775, 1017125, 1261235, 1265975, 1569809, 1650575, 2046713, 2483875, 5215817, 6306175, 6329875, 7849045, 8252875, 10233565, 26079085, 31530875, 39245225, 51167825, 130395425, 161690327, 196226125, 255839125, 651977125, 808451635, 4042258175, 20211290875]

約数ペア:

[(1, 20211290875), (5, 4042258175), (25, 808451635), (31, 651977125), (79, 255839125), (103, 196226125), (125, 161690327), (155, 130395425), (395, 51167825), (515, 39245225), (641, 31530875), (775, 26079085), (1975, 10233565), (2449, 8252875), (2575, 7849045), (3193, 6329875), (3205, 6306175), (3875, 5215817), (8137, 2483875), (9875, 2046713), (12245, 1650575), (12875, 1569809), (15965, 1265975), (16025, 1261235), (19871, 1017125), (40685, 496775), (50639, 399125), (61225, 330115), (66023, 306125), (79825, 253195), (80125, 252247), (99355, 203425)]