78459940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{139}}^1\times {\mathrm{167}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 180774720

約数和(自身を除く): 102314780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 167, 169, 260, 278, 334, 338, 556, 668, 676, 695, 835, 845, 1390, 1670, 1690, 1807, 2171, 2780, 3340, 3380, 3614, 4342, 7228, 8684, 9035, 10855, 18070, 21710, 23213, 23491, 28223, 36140, 43420, 46426, 46982, 56446, 92852, 93964, 112892, 116065, 117455, 141115, 232130, 234910, 282230, 301769, 464260, 469820, 564460, 603538, 1207076, 1508845, 3017690, 3922997, 6035380, 7845994, 15691988, 19614985, 39229970, 78459940]

約数ペア:

[(1, 78459940), (2, 39229970), (4, 19614985), (5, 15691988), (10, 7845994), (13, 6035380), (20, 3922997), (26, 3017690), (52, 1508845), (65, 1207076), (130, 603538), (139, 564460), (167, 469820), (169, 464260), (260, 301769), (278, 282230), (334, 234910), (338, 232130), (556, 141115), (668, 117455), (676, 116065), (695, 112892), (835, 93964), (845, 92852), (1390, 56446), (1670, 46982), (1690, 46426), (1807, 43420), (2171, 36140), (2780, 28223), (3340, 23491), (3380, 23213), (3614, 21710), (4342, 18070), (7228, 10855), (8684, 9035)]