21756748

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^3\times {\mathrm{61}}^1$

素因数の和:135

約数の個数: 48

約数和(自身を含む): 43990240

約数和(自身を除く): 22233492

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 61, 76, 122, 244, 247, 361, 494, 722, 793, 988, 1159, 1444, 1586, 2318, 3172, 4636, 4693, 6859, 9386, 13718, 15067, 18772, 22021, 27436, 30134, 44042, 60268, 88084, 89167, 178334, 286273, 356668, 418399, 572546, 836798, 1145092, 1673596, 5439187, 10878374, 21756748]

約数ペア:

[(1, 21756748), (2, 10878374), (4, 5439187), (13, 1673596), (19, 1145092), (26, 836798), (38, 572546), (52, 418399), (61, 356668), (76, 286273), (122, 178334), (244, 89167), (247, 88084), (361, 60268), (494, 44042), (722, 30134), (793, 27436), (988, 22021), (1159, 18772), (1444, 15067), (1586, 13718), (2318, 9386), (3172, 6859), (4636, 4693)]