21500240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15809}}^1$

素因数の和:15839

約数の個数: 40

約数和(自身を含む): 52931880

約数和(自身を除く): 31431640

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15809, 31618, 63236, 79045, 126472, 158090, 252944, 268753, 316180, 537506, 632360, 1075012, 1264720, 1343765, 2150024, 2687530, 4300048, 5375060, 10750120, 21500240]

約数ペア:

[(1, 21500240), (2, 10750120), (4, 5375060), (5, 4300048), (8, 2687530), (10, 2150024), (16, 1343765), (17, 1264720), (20, 1075012), (34, 632360), (40, 537506), (68, 316180), (80, 268753), (85, 252944), (136, 158090), (170, 126472), (272, 79045), (340, 63236), (680, 31618), (1360, 15809)]