21751340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{311}}^1$

素因数の和:602

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 27781780

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 269, 311, 538, 622, 1076, 1244, 1345, 1555, 2690, 3110, 3497, 4043, 5380, 6220, 6994, 8086, 13988, 16172, 17485, 20215, 34970, 40430, 69940, 80860, 83659, 167318, 334636, 418295, 836590, 1087567, 1673180, 2175134, 4350268, 5437835, 10875670, 21751340]

約数ペア:

[(1, 21751340), (2, 10875670), (4, 5437835), (5, 4350268), (10, 2175134), (13, 1673180), (20, 1087567), (26, 836590), (52, 418295), (65, 334636), (130, 167318), (260, 83659), (269, 80860), (311, 69940), (538, 40430), (622, 34970), (1076, 20215), (1244, 17485), (1345, 16172), (1555, 13988), (2690, 8086), (3110, 6994), (3497, 6220), (4043, 5380)]