19812820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{3067}}^1$

素因数の和:3112

約数の個数: 48

約数和(自身を含む): 46388160

約数和(自身を除く): 26575340

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 323, 340, 380, 646, 1292, 1615, 3067, 3230, 6134, 6460, 12268, 15335, 30670, 52139, 58273, 61340, 104278, 116546, 208556, 233092, 260695, 291365, 521390, 582730, 990641, 1042780, 1165460, 1981282, 3962564, 4953205, 9906410, 19812820]

約数ペア:

[(1, 19812820), (2, 9906410), (4, 4953205), (5, 3962564), (10, 1981282), (17, 1165460), (19, 1042780), (20, 990641), (34, 582730), (38, 521390), (68, 291365), (76, 260695), (85, 233092), (95, 208556), (170, 116546), (190, 104278), (323, 61340), (340, 58273), (380, 52139), (646, 30670), (1292, 15335), (1615, 12268), (3067, 6460), (3230, 6134)]