20638566

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{991}}^1$

素因数の和:1101

約数の個数: 48

約数和(自身を含む): 48746880

約数和(自身を除く): 28108314

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 39, 78, 89, 117, 178, 234, 267, 534, 801, 991, 1157, 1602, 1982, 2314, 2973, 3471, 5946, 6942, 8919, 10413, 12883, 17838, 20826, 25766, 38649, 77298, 88199, 115947, 176398, 231894, 264597, 529194, 793791, 1146587, 1587582, 2293174, 3439761, 6879522, 10319283, 20638566]

約数ペア:

[(1, 20638566), (2, 10319283), (3, 6879522), (6, 3439761), (9, 2293174), (13, 1587582), (18, 1146587), (26, 793791), (39, 529194), (78, 264597), (89, 231894), (117, 176398), (178, 115947), (234, 88199), (267, 77298), (534, 38649), (801, 25766), (991, 20826), (1157, 17838), (1602, 12883), (1982, 10413), (2314, 8919), (2973, 6942), (3471, 5946)]