19929440

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^2\times {\mathrm{431}}^1$

素因数の和:480

約数の個数: 72

約数和(自身を含む): 50131872

約数和(自身を除く): 30202432

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 289, 340, 431, 544, 578, 680, 862, 1156, 1360, 1445, 1724, 2155, 2312, 2720, 2890, 3448, 4310, 4624, 5780, 6896, 7327, 8620, 9248, 11560, 13792, 14654, 17240, 23120, 29308, 34480, 36635, 46240, 58616, 68960, 73270, 117232, 124559, 146540, 234464, 249118, 293080, 498236, 586160, 622795, 996472, 1172320, 1245590, 1992944, 2491180, 3985888, 4982360, 9964720, 19929440]

約数ペア:

[(1, 19929440), (2, 9964720), (4, 4982360), (5, 3985888), (8, 2491180), (10, 1992944), (16, 1245590), (17, 1172320), (20, 996472), (32, 622795), (34, 586160), (40, 498236), (68, 293080), (80, 249118), (85, 234464), (136, 146540), (160, 124559), (170, 117232), (272, 73270), (289, 68960), (340, 58616), (431, 46240), (544, 36635), (578, 34480), (680, 29308), (862, 23120), (1156, 17240), (1360, 14654), (1445, 13792), (1724, 11560), (2155, 9248), (2312, 8620), (2720, 7327), (2890, 6896), (3448, 5780), (4310, 4624)]