21385868

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{659}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 45830400

約数和(自身を除く): 24444532

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 61, 76, 122, 133, 244, 266, 427, 532, 659, 854, 1159, 1318, 1708, 2318, 2636, 4613, 4636, 8113, 9226, 12521, 16226, 18452, 25042, 32452, 40199, 50084, 80398, 87647, 160796, 175294, 281393, 350588, 562786, 763781, 1125572, 1527562, 3055124, 5346467, 10692934, 21385868]

約数ペア:

[(1, 21385868), (2, 10692934), (4, 5346467), (7, 3055124), (14, 1527562), (19, 1125572), (28, 763781), (38, 562786), (61, 350588), (76, 281393), (122, 175294), (133, 160796), (244, 87647), (266, 80398), (427, 50084), (532, 40199), (659, 32452), (854, 25042), (1159, 18452), (1318, 16226), (1708, 12521), (2318, 9226), (2636, 8113), (4613, 4636)]