407940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{523}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 1232448

約数和(自身を除く): 824508

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, 523, 780, 1046, 1569, 2092, 2615, 3138, 5230, 6276, 6799, 7845, 10460, 13598, 15690, 20397, 27196, 31380, 33995, 40794, 67990, 81588, 101985, 135980, 203970, 407940]

約数ペア:

[(1, 407940), (2, 203970), (3, 135980), (4, 101985), (5, 81588), (6, 67990), (10, 40794), (12, 33995), (13, 31380), (15, 27196), (20, 20397), (26, 15690), (30, 13598), (39, 10460), (52, 7845), (60, 6799), (65, 6276), (78, 5230), (130, 3138), (156, 2615), (195, 2092), (260, 1569), (390, 1046), (523, 780)]