21250810

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1399}}^1$

素因数の和:1451

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 24713990

約数列:

[1, 2, 5, 7, 10, 14, 31, 35, 49, 62, 70, 98, 155, 217, 245, 310, 434, 490, 1085, 1399, 1519, 2170, 2798, 3038, 6995, 7595, 9793, 13990, 15190, 19586, 43369, 48965, 68551, 86738, 97930, 137102, 216845, 303583, 342755, 433690, 607166, 685510, 1517915, 2125081, 3035830, 4250162, 10625405, 21250810]

約数ペア:

[(1, 21250810), (2, 10625405), (5, 4250162), (7, 3035830), (10, 2125081), (14, 1517915), (31, 685510), (35, 607166), (49, 433690), (62, 342755), (70, 303583), (98, 216845), (155, 137102), (217, 97930), (245, 86738), (310, 68551), (434, 48965), (490, 43369), (1085, 19586), (1399, 15190), (1519, 13990), (2170, 9793), (2798, 7595), (3038, 6995)]