21701940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27823}}^1$

素因数の和:27848

約数の個数: 48

約数和(自身を含む): 65442048

約数和(自身を除く): 43740108

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27823, 55646, 83469, 111292, 139115, 166938, 278230, 333876, 361699, 417345, 556460, 723398, 834690, 1085097, 1446796, 1669380, 1808495, 2170194, 3616990, 4340388, 5425485, 7233980, 10850970, 21701940]

約数ペア:

[(1, 21701940), (2, 10850970), (3, 7233980), (4, 5425485), (5, 4340388), (6, 3616990), (10, 2170194), (12, 1808495), (13, 1669380), (15, 1446796), (20, 1085097), (26, 834690), (30, 723398), (39, 556460), (52, 417345), (60, 361699), (65, 333876), (78, 278230), (130, 166938), (156, 139115), (195, 111292), (260, 83469), (390, 55646), (780, 27823)]