21547995

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1543}}^1$

素因数の和:1584

約数の個数: 48

約数和(自身を含む): 42243840

約数和(自身を除く): 20695845

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1543, 1995, 2793, 4629, 4655, 7715, 10801, 13965, 23145, 29317, 32403, 54005, 75607, 87951, 146585, 162015, 205219, 226821, 378035, 439755, 615657, 1026095, 1134105, 1436533, 3078285, 4309599, 7182665, 21547995]

約数ペア:

[(1, 21547995), (3, 7182665), (5, 4309599), (7, 3078285), (15, 1436533), (19, 1134105), (21, 1026095), (35, 615657), (49, 439755), (57, 378035), (95, 226821), (105, 205219), (133, 162015), (147, 146585), (245, 87951), (285, 75607), (399, 54005), (665, 32403), (735, 29317), (931, 23145), (1543, 13965), (1995, 10801), (2793, 7715), (4629, 4655)]