19830980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{857}}^1$

素因数の和:968

約数の個数: 48

約数和(自身を含む): 45405360

約数和(自身を除く): 25574380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 857, 890, 1157, 1714, 1780, 2314, 3428, 4285, 4628, 5785, 8570, 11141, 11570, 17140, 22282, 23140, 44564, 55705, 76273, 111410, 152546, 222820, 305092, 381365, 762730, 991549, 1525460, 1983098, 3966196, 4957745, 9915490, 19830980]

約数ペア:

[(1, 19830980), (2, 9915490), (4, 4957745), (5, 3966196), (10, 1983098), (13, 1525460), (20, 991549), (26, 762730), (52, 381365), (65, 305092), (89, 222820), (130, 152546), (178, 111410), (260, 76273), (356, 55705), (445, 44564), (857, 23140), (890, 22282), (1157, 17140), (1714, 11570), (1780, 11141), (2314, 8570), (3428, 5785), (4285, 4628)]