28711280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1453}}^1$

素因数の和:1498

約数の個数: 80

約数和(自身を含む): 75724320

約数和(自身を除く): 47013040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1235, 1453, 1520, 1976, 2470, 2906, 3952, 4940, 5812, 7265, 9880, 11624, 14530, 18889, 19760, 23248, 27607, 29060, 37778, 55214, 58120, 75556, 94445, 110428, 116240, 138035, 151112, 188890, 220856, 276070, 302224, 358891, 377780, 441712, 552140, 717782, 755560, 1104280, 1435564, 1511120, 1794455, 2208560, 2871128, 3588910, 5742256, 7177820, 14355640, 28711280]

約数ペア:

[(1, 28711280), (2, 14355640), (4, 7177820), (5, 5742256), (8, 3588910), (10, 2871128), (13, 2208560), (16, 1794455), (19, 1511120), (20, 1435564), (26, 1104280), (38, 755560), (40, 717782), (52, 552140), (65, 441712), (76, 377780), (80, 358891), (95, 302224), (104, 276070), (130, 220856), (152, 188890), (190, 151112), (208, 138035), (247, 116240), (260, 110428), (304, 94445), (380, 75556), (494, 58120), (520, 55214), (760, 37778), (988, 29060), (1040, 27607), (1235, 23248), (1453, 19760), (1520, 18889), (1976, 14530), (2470, 11624), (2906, 9880), (3952, 7265), (4940, 5812)]