19800417

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:154

約数の個数: 64

約数和(自身を含む): 34997760

約数和(自身を除く): 15197343

約数列:

[1, 3, 7, 13, 21, 29, 39, 41, 61, 87, 91, 123, 183, 203, 273, 287, 377, 427, 533, 609, 793, 861, 1131, 1189, 1281, 1599, 1769, 2379, 2501, 2639, 3567, 3731, 5307, 5551, 7503, 7917, 8323, 11193, 12383, 15457, 16653, 17507, 22997, 24969, 32513, 37149, 46371, 52521, 68991, 72529, 97539, 108199, 160979, 217587, 227591, 324597, 482937, 507703, 682773, 942877, 1523109, 2828631, 6600139, 19800417]

約数ペア:

[(1, 19800417), (3, 6600139), (7, 2828631), (13, 1523109), (21, 942877), (29, 682773), (39, 507703), (41, 482937), (61, 324597), (87, 227591), (91, 217587), (123, 160979), (183, 108199), (203, 97539), (273, 72529), (287, 68991), (377, 52521), (427, 46371), (533, 37149), (609, 32513), (793, 24969), (861, 22997), (1131, 17507), (1189, 16653), (1281, 15457), (1599, 12383), (1769, 11193), (2379, 8323), (2501, 7917), (2639, 7503), (3567, 5551), (3731, 5307)]