19897980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{541}}^1\times {\mathrm{613}}^1$

素因数の和:1166

約数の個数: 48

約数和(自身を含む): 55908384

約数和(自身を除く): 36010404

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 541, 613, 1082, 1226, 1623, 1839, 2164, 2452, 2705, 3065, 3246, 3678, 5410, 6130, 6492, 7356, 8115, 9195, 10820, 12260, 16230, 18390, 32460, 36780, 331633, 663266, 994899, 1326532, 1658165, 1989798, 3316330, 3979596, 4974495, 6632660, 9948990, 19897980]

約数ペア:

[(1, 19897980), (2, 9948990), (3, 6632660), (4, 4974495), (5, 3979596), (6, 3316330), (10, 1989798), (12, 1658165), (15, 1326532), (20, 994899), (30, 663266), (60, 331633), (541, 36780), (613, 32460), (1082, 18390), (1226, 16230), (1623, 12260), (1839, 10820), (2164, 9195), (2452, 8115), (2705, 7356), (3065, 6492), (3246, 6130), (3678, 5410)]