19483880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{421}}^1$

素因数の和:534

約数の個数: 64

約数和(自身を含む): 47854800

約数和(自身を除く): 28370920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 89, 104, 130, 178, 260, 356, 421, 445, 520, 712, 842, 890, 1157, 1684, 1780, 2105, 2314, 3368, 3560, 4210, 4628, 5473, 5785, 8420, 9256, 10946, 11570, 16840, 21892, 23140, 27365, 37469, 43784, 46280, 54730, 74938, 109460, 149876, 187345, 218920, 299752, 374690, 487097, 749380, 974194, 1498760, 1948388, 2435485, 3896776, 4870970, 9741940, 19483880]

約数ペア:

[(1, 19483880), (2, 9741940), (4, 4870970), (5, 3896776), (8, 2435485), (10, 1948388), (13, 1498760), (20, 974194), (26, 749380), (40, 487097), (52, 374690), (65, 299752), (89, 218920), (104, 187345), (130, 149876), (178, 109460), (260, 74938), (356, 54730), (421, 46280), (445, 43784), (520, 37469), (712, 27365), (842, 23140), (890, 21892), (1157, 16840), (1684, 11570), (1780, 10946), (2105, 9256), (2314, 8420), (3368, 5785), (3560, 5473), (4210, 4628)]