19949940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{809}}^1$

素因数の和:961

約数の個数: 72

約数和(自身を含む): 61031880

約数和(自身を除く): 41081940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 137, 180, 274, 411, 548, 685, 809, 822, 1233, 1370, 1618, 1644, 2055, 2427, 2466, 2740, 3236, 4045, 4110, 4854, 4932, 6165, 7281, 8090, 8220, 9708, 12135, 12330, 14562, 16180, 24270, 24660, 29124, 36405, 48540, 72810, 110833, 145620, 221666, 332499, 443332, 554165, 664998, 997497, 1108330, 1329996, 1662495, 1994994, 2216660, 3324990, 3989988, 4987485, 6649980, 9974970, 19949940]

約数ペア:

[(1, 19949940), (2, 9974970), (3, 6649980), (4, 4987485), (5, 3989988), (6, 3324990), (9, 2216660), (10, 1994994), (12, 1662495), (15, 1329996), (18, 1108330), (20, 997497), (30, 664998), (36, 554165), (45, 443332), (60, 332499), (90, 221666), (137, 145620), (180, 110833), (274, 72810), (411, 48540), (548, 36405), (685, 29124), (809, 24660), (822, 24270), (1233, 16180), (1370, 14562), (1618, 12330), (1644, 12135), (2055, 9708), (2427, 8220), (2466, 8090), (2740, 7281), (3236, 6165), (4045, 4932), (4110, 4854)]