18940220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{751}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 43333248

約数和(自身を除く): 24393028

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 97, 130, 194, 260, 388, 485, 751, 970, 1261, 1502, 1940, 2522, 3004, 3755, 5044, 6305, 7510, 9763, 12610, 15020, 19526, 25220, 39052, 48815, 72847, 97630, 145694, 195260, 291388, 364235, 728470, 947011, 1456940, 1894022, 3788044, 4735055, 9470110, 18940220]

約数ペア:

[(1, 18940220), (2, 9470110), (4, 4735055), (5, 3788044), (10, 1894022), (13, 1456940), (20, 947011), (26, 728470), (52, 364235), (65, 291388), (97, 195260), (130, 145694), (194, 97630), (260, 72847), (388, 48815), (485, 39052), (751, 25220), (970, 19526), (1261, 15020), (1502, 12610), (1940, 9763), (2522, 7510), (3004, 6305), (3755, 5044)]