19800400

素因数分解:

$2^4\times 5^2\times {\mathrm{59}}^1\times {\mathrm{839}}^1$

素因数の和:916

約数の個数: 60

約数和(自身を含む): 48434400

約数和(自身を除く): 28634000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 59, 80, 100, 118, 200, 236, 295, 400, 472, 590, 839, 944, 1180, 1475, 1678, 2360, 2950, 3356, 4195, 4720, 5900, 6712, 8390, 11800, 13424, 16780, 20975, 23600, 33560, 41950, 49501, 67120, 83900, 99002, 167800, 198004, 247505, 335600, 396008, 495010, 792016, 990020, 1237525, 1980040, 2475050, 3960080, 4950100, 9900200, 19800400]

約数ペア:

[(1, 19800400), (2, 9900200), (4, 4950100), (5, 3960080), (8, 2475050), (10, 1980040), (16, 1237525), (20, 990020), (25, 792016), (40, 495010), (50, 396008), (59, 335600), (80, 247505), (100, 198004), (118, 167800), (200, 99002), (236, 83900), (295, 67120), (400, 49501), (472, 41950), (590, 33560), (839, 23600), (944, 20975), (1180, 16780), (1475, 13424), (1678, 11800), (2360, 8390), (2950, 6712), (3356, 5900), (4195, 4720)]