21416720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20593}}^1$

素因数の和:20619

約数の個数: 40

約数和(自身を含む): 53626776

約数和(自身を除く): 32210056

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20593, 41186, 82372, 102965, 164744, 205930, 267709, 329488, 411860, 535418, 823720, 1070836, 1338545, 1647440, 2141672, 2677090, 4283344, 5354180, 10708360, 21416720]

約数ペア:

[(1, 21416720), (2, 10708360), (4, 5354180), (5, 4283344), (8, 2677090), (10, 2141672), (13, 1647440), (16, 1338545), (20, 1070836), (26, 823720), (40, 535418), (52, 411860), (65, 329488), (80, 267709), (104, 205930), (130, 164744), (208, 102965), (260, 82372), (520, 41186), (1040, 20593)]