19917700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{953}}^1$

素因数の和:997

約数の個数: 72

約数和(自身を含む): 49684320

約数和(自身を除く): 29766620

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 25, 38, 44, 50, 55, 76, 95, 100, 110, 190, 209, 220, 275, 380, 418, 475, 550, 836, 950, 953, 1045, 1100, 1900, 1906, 2090, 3812, 4180, 4765, 5225, 9530, 10450, 10483, 18107, 19060, 20900, 20966, 23825, 36214, 41932, 47650, 52415, 72428, 90535, 95300, 104830, 181070, 199177, 209660, 262075, 362140, 398354, 452675, 524150, 796708, 905350, 995885, 1048300, 1810700, 1991770, 3983540, 4979425, 9958850, 19917700]

約数ペア:

[(1, 19917700), (2, 9958850), (4, 4979425), (5, 3983540), (10, 1991770), (11, 1810700), (19, 1048300), (20, 995885), (22, 905350), (25, 796708), (38, 524150), (44, 452675), (50, 398354), (55, 362140), (76, 262075), (95, 209660), (100, 199177), (110, 181070), (190, 104830), (209, 95300), (220, 90535), (275, 72428), (380, 52415), (418, 47650), (475, 41932), (550, 36214), (836, 23825), (950, 20966), (953, 20900), (1045, 19060), (1100, 18107), (1900, 10483), (1906, 10450), (2090, 9530), (3812, 5225), (4180, 4765)]