20378240

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1873}}^1$

素因数の和:1909

約数の個数: 64

約数和(自身を含む): 51609960

約数和(自身を除く): 31231720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1873, 2176, 2720, 3746, 5440, 7492, 9365, 10880, 14984, 18730, 29968, 31841, 37460, 59936, 63682, 74920, 119872, 127364, 149840, 159205, 239744, 254728, 299680, 318410, 509456, 599360, 636820, 1018912, 1198720, 1273640, 2037824, 2547280, 4075648, 5094560, 10189120, 20378240]

約数ペア:

[(1, 20378240), (2, 10189120), (4, 5094560), (5, 4075648), (8, 2547280), (10, 2037824), (16, 1273640), (17, 1198720), (20, 1018912), (32, 636820), (34, 599360), (40, 509456), (64, 318410), (68, 299680), (80, 254728), (85, 239744), (128, 159205), (136, 149840), (160, 127364), (170, 119872), (272, 74920), (320, 63682), (340, 59936), (544, 37460), (640, 31841), (680, 29968), (1088, 18730), (1360, 14984), (1873, 10880), (2176, 9365), (2720, 7492), (3746, 5440)]