21851120

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{16067}}^1$

素因数の和:16097

約数の個数: 40

約数和(自身を含む): 53795664

約数和(自身を除く): 31944544

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 16067, 32134, 64268, 80335, 128536, 160670, 257072, 273139, 321340, 546278, 642680, 1092556, 1285360, 1365695, 2185112, 2731390, 4370224, 5462780, 10925560, 21851120]

約数ペア:

[(1, 21851120), (2, 10925560), (4, 5462780), (5, 4370224), (8, 2731390), (10, 2185112), (16, 1365695), (17, 1285360), (20, 1092556), (34, 642680), (40, 546278), (68, 321340), (80, 273139), (85, 257072), (136, 160670), (170, 128536), (272, 80335), (340, 64268), (680, 32134), (1360, 16067)]