20984838

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:677

約数の個数: 48

約数和(自身を含む): 49272624

約数和(自身を除く): 28287786

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 137, 147, 274, 294, 411, 521, 822, 959, 1042, 1563, 1918, 2877, 3126, 3647, 5754, 6713, 7294, 10941, 13426, 20139, 21882, 25529, 40278, 51058, 71377, 76587, 142754, 153174, 214131, 428262, 499639, 999278, 1498917, 2997834, 3497473, 6994946, 10492419, 20984838]

約数ペア:

[(1, 20984838), (2, 10492419), (3, 6994946), (6, 3497473), (7, 2997834), (14, 1498917), (21, 999278), (42, 499639), (49, 428262), (98, 214131), (137, 153174), (147, 142754), (274, 76587), (294, 71377), (411, 51058), (521, 40278), (822, 25529), (959, 21882), (1042, 20139), (1563, 13426), (1918, 10941), (2877, 7294), (3126, 6713), (3647, 5754)]